Homework Help: statistics

Posted by treal on Tuesday, August 23, 2011 at 6:59pm.

a researcher is interested in studying people's mean age in a certain region. If the population standard deviation is known to be 8 years and 1.5 year of error margin is allowed, find the minimum simple size the researcher needs to use, knowing that he is going to conduct his study using 95% confidence level.

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